hen pecked and cant stand long

I have a 2 month old hen that has been pecked bloody and entire bare spot on her back I brought her inside and cleaned her with hydrogen peroxide and now it is healed and done bleeding but it is turning into green splotches on her back and the entire time she has not been able to walk but hobble and then fall over, her feet do not appear to be curled and she was an incubated chick. cant upload pics on this computer but I can picture message if needed to see I don't want to lose her shes like my baby and am unsure what to do next except lots of vitamins for maybe deficiency's please help